US4937931A - Method of manufacturing a saddle-shaped deflection coil for a picture display tube - Google Patents

Method of manufacturing a saddle-shaped deflection coil for a picture display tube Download PDF

Info

Publication number
US4937931A
US4937931A US07/461,889 US46188990A US4937931A US 4937931 A US4937931 A US 4937931A US 46188990 A US46188990 A US 46188990A US 4937931 A US4937931 A US 4937931A
Authority
US
United States
Prior art keywords
connection portion
winding
coil
saddle
deflection coil
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/461,889
Other languages
English (en)
Inventor
Franciscus C. A. J. Jacobs
Nicolaas G. Vink
Franciscus M. P. P. Doomernik
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
US Philips Corp
Original Assignee
US Philips Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by US Philips Corp filed Critical US Philips Corp
Assigned to U.S. PHILIPS CORPORATION reassignment U.S. PHILIPS CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: DOOMERNIK, FRANCISCUS M. P. P., JACOBS, FRANCISCUS C. A. J., VINK, NICOLAAS G.
Application granted granted Critical
Publication of US4937931A publication Critical patent/US4937931A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J9/00—Apparatus or processes specially adapted for the manufacture, installation, removal, maintenance of electric discharge tubes, discharge lamps, or parts thereof; Recovery of material from discharge tubes or lamps
    • H01J9/236—Manufacture of magnetic deflecting devices for cathode-ray tubes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/06—Coil winding
    • H01F41/071—Winding coils of special form
    • H01F2041/0711—Winding saddle or deflection coils
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49071—Electromagnet, transformer or inductor by winding or coiling

Definitions

  • the invention relates to a method of continuously winding in a winding space a saddle-shaped deflection coil flaring from a rear end towards a front end and having a connection portion at its front end and a connection portion at its rear end between which longitudinal turn sections extend.
  • the above-mentioned method in which a winding space is formed between two winding jig halves is conventionally used for winding saddle-shaped coils.
  • the properties of the coil may be influenced by determining the location of the open spaces during the design and by selecting the number of turns per section during winding. In many cases this provides the possibility of adapting the distribution of the magnetic flux generated by the coil to the requirements imposed. However, it has been found that this possibility is not adequate in all cases, particularly when more refined corrections are to be provided. Such corrections are necessary, for example if certain convergence (field coma) errors are to be reduced in colour display tubes of the in-line type.
  • the invention provides a solution in those cases where deflection coils of the saddle type (with upstanding or lying front connection portions and upstanding or lying rear connection portions) are used.
  • a method of continuously winding a saddle-shaped deflection coil flaring from a rear connection portion towards a front connection portion is therefore characterized in that at least one connection portion is given a convex shape during winding and in that after winding the convex connection portion is given a concave shape by means of a die, whereafter the coil turns are united to a compact assembly by means of a heating step.
  • a concave connection portion is formed at the front and/or rear coil end.
  • the extent of concavity can be used as an extra design parameter. For the setmaker this means that he can dispense with given correction circuits hitherto required.
  • An embodiment of the method according to the invention is characterized in that for providing a convex shape at least one symmetrical pair of pins is introduced into the winding space proximate to one ene of the coil and transversely to the plane of the longitudinal turns of the coil at a position which is located outwardly with respect to the end, and in that the connection portion is wound around said pins.
  • the method is preferably performed in such a way that such a length of wire is used for winding the connection portion of the deflection coil that substantially no mechanical stress is produced when the connection portion is given the concave shape.
  • FIG. 1 is a diagrammatic longitudinal section through a part of a picture display tube with a deflection system
  • FIG. 2 is a perspective elevational view of a field deflection coil wound by means of the method according to the invention
  • FIG. 3 is a perspective elevational view of a line deflection coil wound by means of the method according to the invention.
  • FIG. 4 shows diagrammatically a part of winding device for use of the method according to the invention during a first step of the method
  • FIG. 5 shows diagrammatically a part of a winding device for use of the method according to the invention during a second step of the method.
  • FIG. 1 shows a colour display tube 1 comprising an electron gun system 2 for generating three electron beams which are directed towards a display screen 3 having a repetitive pattern of red, green and blue phosphor elements.
  • An electromagnetic deflection system 4 is arranged around the path of the electron beams coaxially with the axis of the tube between the electron gun system 2 and the display screen 3.
  • the deflection system 4 comprises a funnel-shaped synthetic material coil support 5 which supports a line deflection coil system 6, 7 at its inner side for deflecting the electron beams generated by the electron gun system 3 in a horizontal direction.
  • the flared line deflection coils 6, 7 are of the saddle type and have a front flange 8, 9 at their widest end, which flange is formed by the connection wires between the axial conductor packets and is substantially trasverse to the axis 10 of the display tube. At their narrowest end the coils 6, 7 have packets of connection wires 11, 12 which connect the axial conductor packets of each coil 6, 7 to each other and are laid across the surface of the display tube 1. In the case shown the coils 6, 7 are of the type having a "lying" rear flange.
  • the coil support 5 supports two saddle-shaped field deflection coils 15, 15' at its outer side for deflecting electron beams generated by the electron gun system 3 in a vertical direction.
  • a ferromagnetic annular core 13 surrounds the two coil sets.
  • the field deflection coils are of the type having an upstanding front flange 16, 17 and a lying a rear flange.
  • the method according to the invention can be used to give the front flange and/or the rear flange of the coils 15, 15' a desired concave shape.
  • the invention is not limited to its use for such types of coils.
  • the invention may also be used, for example to give the front flange of saddle coils having a non-upstanding front flange a desired concave shape.
  • connection wires are laid across the display tube surfate at the wide end.
  • the invention can also be used to give the front flange of saddle coils with an upstanding rear flange a desired concave shape.
  • FIG. 2 is an elevational view of a (field) deflection coil 15 having a concave lying rear connection portion 18 which satisfies this object.
  • a strong positive six-pole component in the gun-sided part of the vertical deflection field is necessary for field coma correction. (The effect of a positive six-pole component on this dipole deflection field is a pincushion-shaped field variation).
  • red and blue are understood to mean: a vertical displacement of red and blue relative to green. If no coma correction measures are taken, red and blue will be deflected to a stronger extent than green. In the case of a pincushion-shaped deflection field at the gun side red and blue are subjected to a weaker deflection field than green. Red and blue will therefore be deflected to a less strong extent.
  • a pincushion-shaped field is generated if the window openings of the two saddle coils of a deflection coil systems are large, and a barrel-shaped field is generated if the window openings are small.
  • the vertical deflection field in the central region should have a barrel-shaped distribution (the separate saddle-shaped field deflection coils 15, 15' thus must have a small window opening 19 in the centre), a pincushion-shaped distribution at the gun side (: large window opening) and at the flared end a pincushion-shaped distribution which should be stronger as less east-west raster distortion is to be admitted.
  • a field deflection coil for use in a colour monitor display system can be wound, which results in that a field deflection field is generated witht the field shape desired for self-convergence and/or east-west raster distortion without additional auxiliary means being required at least at the gun side.
  • connection wires crossing in this way have the drawback that there is a fixed relationship, notably between the dipole and six-pole field strength.
  • a coil end connection portion which is concave with respect to a circular track can change this relationship.
  • the convex shape is realised by placing a number of (at least two) auxiliary pins 21, 22 in the surface of winding jig 20, which pins are removed from the winding jig 20 after the coil but before baking and pressing.
  • the extra wound wire length with respect to connection wires crossing in accordance with a circular track is just sufficient to compensate for the increase in length which is used for giving the coil end 24 (FIG. 5) a concave shape by means of an accurately shaped die 23.
  • the wound wire is not additionally stretched when providing the concave shape so that no mechanical stresses are produced.
  • the coil is firstly wound in a first stable position and is subsequently brought to a second stable position by means of pressing. This ensures a good temperature stability of the obtained field deflection coil with a concave lying rear end. In this way it is possible to make, for example a field deflection coil which is substantially free from coma. More generally, the inventive method of winding a deflection coil can, however, the used in all those cases where an upstanding or lying flange with connection wires must be given a concave shape.
  • An example of a (line) deflection coil 6 which has a concave (upstanding) front connection portion 8 for the purpose of a good raster performance is shown in FIG. 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
US07/461,889 1989-01-30 1990-01-08 Method of manufacturing a saddle-shaped deflection coil for a picture display tube Expired - Fee Related US4937931A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8900213A NL8900213A (nl) 1989-01-30 1989-01-30 Werkwijze voor het vervaardigen van een zadelvormige afbuigspoel voor een beeldweergeefbuis.
NL8900213 1989-01-30

Publications (1)

Publication Number Publication Date
US4937931A true US4937931A (en) 1990-07-03

Family

ID=19854034

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/461,889 Expired - Fee Related US4937931A (en) 1989-01-30 1990-01-08 Method of manufacturing a saddle-shaped deflection coil for a picture display tube

Country Status (5)

Country Link
US (1) US4937931A (de)
EP (1) EP0381267B1 (de)
JP (1) JP2849612B2 (de)
DE (1) DE69027544T2 (de)
NL (1) NL8900213A (de)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5121028A (en) * 1989-10-31 1992-06-09 Videocolor S.A. Deflection winding with spaces or tabs intermediate its front and rear ends
US5340044A (en) * 1990-01-09 1994-08-23 U.S. Philips Corporation Method of manufacturing a saddle-shaped deflection coil for a picture display tube
US5402091A (en) * 1992-09-28 1995-03-28 Murata Mfg. Co., Ltd. Frame body for use in winding a coil for deflection yoke
US5506469A (en) * 1991-11-01 1996-04-09 U.S. Philips Corporation Display tube with deflection unit comprising field deflection coils of the semi-saddle type
US5769351A (en) * 1993-12-07 1998-06-23 U.S. Philips Corporation Method of winding a saddle-shaped deflection coil
US6107904A (en) * 1998-04-24 2000-08-22 Thomson Tubes & Displays Asymmetry forming arrangement in a deflection winding
US6548951B1 (en) * 1999-11-17 2003-04-15 Koninklijke Philips Electronics N.V. Deflection unit for a cathode ray tube and method of manufacturing a saddle-shaped deflection coil
US6590329B2 (en) 2000-03-08 2003-07-08 Matsushita Electric Industrial Co., Ltd Deflection yoke with a low power consumption
US20030131467A1 (en) * 2000-05-17 2003-07-17 Walter Kogler Method and device for manufacturing of saddle coils
US6670745B2 (en) 2001-03-27 2003-12-30 Sarnoff Corporation Cathode ray tube deflection yoke
US6691399B1 (en) * 1999-01-22 2004-02-17 Canon Kabushiki Kaisha Method of mounting a coil unit for use as an image heating apparatus

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5485054A (en) * 1992-10-09 1996-01-16 U.S. Philips Corporation Display tube having a deflection coil support and an auxiliary deflection coil support
KR20000010265A (ko) * 1998-07-31 2000-02-15 이형도 편향 요크의 편향 코일 및 그 편향 코일을 이용한 그린 특성 개선 방법
KR100786830B1 (ko) * 2001-08-17 2007-12-20 삼성에스디아이 주식회사 음극선관용 편향 장치
KR20040009198A (ko) * 2002-07-22 2004-01-31 삼성전기주식회사 편향 요크용 수평코일

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4464643A (en) * 1983-01-06 1984-08-07 U.S. Philips Corporation Device for displaying television pictures and deflection unit therefor
US4694868A (en) * 1984-12-10 1987-09-22 Siemens Aktiengesellschaft Apparatus for manufacturing a disc-shaped curved magnet coil
US4819323A (en) * 1987-02-06 1989-04-11 U.S. Philips Corporation Method of manufacturing an electro-magnetic deflection unit for a cathode ray tube

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4464643A (en) * 1983-01-06 1984-08-07 U.S. Philips Corporation Device for displaying television pictures and deflection unit therefor
US4694868A (en) * 1984-12-10 1987-09-22 Siemens Aktiengesellschaft Apparatus for manufacturing a disc-shaped curved magnet coil
US4819323A (en) * 1987-02-06 1989-04-11 U.S. Philips Corporation Method of manufacturing an electro-magnetic deflection unit for a cathode ray tube

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5121028A (en) * 1989-10-31 1992-06-09 Videocolor S.A. Deflection winding with spaces or tabs intermediate its front and rear ends
US5340044A (en) * 1990-01-09 1994-08-23 U.S. Philips Corporation Method of manufacturing a saddle-shaped deflection coil for a picture display tube
US5506469A (en) * 1991-11-01 1996-04-09 U.S. Philips Corporation Display tube with deflection unit comprising field deflection coils of the semi-saddle type
US5402091A (en) * 1992-09-28 1995-03-28 Murata Mfg. Co., Ltd. Frame body for use in winding a coil for deflection yoke
US5769351A (en) * 1993-12-07 1998-06-23 U.S. Philips Corporation Method of winding a saddle-shaped deflection coil
US6107904A (en) * 1998-04-24 2000-08-22 Thomson Tubes & Displays Asymmetry forming arrangement in a deflection winding
US6691399B1 (en) * 1999-01-22 2004-02-17 Canon Kabushiki Kaisha Method of mounting a coil unit for use as an image heating apparatus
US6548951B1 (en) * 1999-11-17 2003-04-15 Koninklijke Philips Electronics N.V. Deflection unit for a cathode ray tube and method of manufacturing a saddle-shaped deflection coil
US6590329B2 (en) 2000-03-08 2003-07-08 Matsushita Electric Industrial Co., Ltd Deflection yoke with a low power consumption
US20030131467A1 (en) * 2000-05-17 2003-07-17 Walter Kogler Method and device for manufacturing of saddle coils
US6670745B2 (en) 2001-03-27 2003-12-30 Sarnoff Corporation Cathode ray tube deflection yoke

Also Published As

Publication number Publication date
NL8900213A (nl) 1990-08-16
EP0381267B1 (de) 1996-06-26
JPH02230632A (ja) 1990-09-13
DE69027544D1 (de) 1996-08-01
DE69027544T2 (de) 1997-01-23
JP2849612B2 (ja) 1999-01-20
EP0381267A1 (de) 1990-08-08

Similar Documents

Publication Publication Date Title
US4937931A (en) Method of manufacturing a saddle-shaped deflection coil for a picture display tube
US5506469A (en) Display tube with deflection unit comprising field deflection coils of the semi-saddle type
US5013964A (en) Method of manufacturing a saddle-shaped deflection coil for a picture display tube and display tube comprising a deflection system using saddle-shaped deflection coils
US4612525A (en) Method of manufacturing a saddle-shaped deflection coil for a picture display tube and deflection system having saddle-shaped deflection coils
US5418422A (en) Combination of display tube and deflection unit comprising line deflection coils of the semi-saddle type with a gun-sided extension
KR100264198B1 (ko) 안장형 코일 편향 권선 및 이것의 제조를 위한 장치 및 방법
EP0436998B1 (de) Verfahren zum Herstellen einer sattelförmigen Ablenkspule für eine Bildwiedergaberöhre
US4272727A (en) Self-converging deflection units for color display tubes of different screen formats
JP2001507160A (ja) 偏向ヨークと幾何歪み補正
US5001390A (en) Combination of a display tube and a deflection unit, with reduced north-south raster error
EP0490004A1 (de) Ablenkjoch mit Verstärker der harmonischen Feldkomponenten
EP0244908B1 (de) Verfahren zur Korrektur der dynamischen Konvergenzfehler und Farbbildröhre
US5769351A (en) Method of winding a saddle-shaped deflection coil
EP0569079B1 (de) Bildröhren-Ablenkeinheitkombination mit Horizentalablenkspulen vom Halbsatteltyp mit einem strahlerzeugerseitigem Ausbau
US6548951B1 (en) Deflection unit for a cathode ray tube and method of manufacturing a saddle-shaped deflection coil
US6734614B1 (en) Saddle-shaped deflection coil and winding method
US6172451B1 (en) Deflection yoke with vertical pincushion distortion
JPH07226173A (ja) カラー受像管装置

Legal Events

Date Code Title Description
AS Assignment

Owner name: U.S. PHILIPS CORPORATION, NEW YORK

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:JACOBS, FRANCISCUS C. A. J.;VINK, NICOLAAS G.;DOOMERNIK, FRANCISCUS M. P. P.;REEL/FRAME:005218/0764

Effective date: 19891130

FEPP Fee payment procedure

Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

FPAY Fee payment

Year of fee payment: 4

FPAY Fee payment

Year of fee payment: 8

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

FP Lapsed due to failure to pay maintenance fee

Effective date: 20020703